Machine for rolling tube ends.



N0 MODEL.

PATENTED DEC. 29, 1903.

H. RINNE.

MACHINE FOR ROLLING TUBE ENDS.

APPLICATION FILED JULY-8, 1902.

2 SHEETS-SHEET 1.

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No. 748,100. PATENTED DEC. 29, 1903. HpRINNE.

MACHINE FOR ROLLING TUBE ENDS.

APPLICATION FILED JULY 3,1902. N0 MODEL. 2 SHEETS-SHEET z,

UNITED STATES Patented neembr 29, 1903.

v PATENT OFFICE.

MACHINE FOR ROLLING TUBE ENDS.

SPECIFICATION formingpart of Letters Patent No. 748,100, dated December 2 1903- Application filed July 8, 1902.

To all whom it may concern: I

Be itknown that I, HERMANN RINNE, a citizen of the German Empire,whose post-office address is No. 17 Kronprinzenstrasse, Essenon-the-Ruhr, Prussia, German Empire, have invented a certain new and useful Machine for Rolling Tube Ends, of which the following is a specification.

In the manufacture of steam-boiler firetubes or boiler casin g or jacket pipes,whether welded, seamless, smooth, or corrugated, it is necessary that the ends of such tubes or pipes which are to be joined either to the ends of the boilers or to adjoining pipes or tubes by means of rivets should have peripheries pre-, cisely correspondingto those of the part of the boiler to which they belong. With the method now employed-in the manufacture of such boiler parts the desired peripheral dimensions 1 can only be secured by heating the ends of the fire-tubes (or jacket tubes or pipes, as the case may be) in the fire and then adjusting their size by contraction or enlargement until the required peripheral measurements are attained. The employment of a rolling proc- V ess-such, for example, as is used in rolling wheel-tires or of a'method of shaping or pro filing tube ends irrespective of whether the ends of tubes are treated cold or in a more or less heated condition-4s not adequate to the purpose of producing tube or pipe ends of precisely predetermined peripheral dimensions, because they afford no means of e'xercising at any time during the rolling process an efiective control upon the measurement of the periphery of the tube endwhich is being rolled. In other Words, they do not permit the enlargement or contraction of the tube end to be with absolute certainty discontinued at the precise moment when the proper dimensions have been reached.

Now the present invention consists in a rolling-machine which enables the ends of boiler tubes or pipes to be brought to exactly the requisite size by cold-rolling and which renders any subsequent finishing or adjusting operation entirely unnecessary.

The annexed drawings show a preferred machine constructed in accordance with the invention. 1

In said drawings, Figure 1 is an elevation, partly in vertical section, on line A of Fig.

Serial Nd 114,713. (No model.)

2. Fig. 2 is a top view, partly in horizontal section, on line B of Fig. 1;

A ring a, made of hard and elastic material and so turned as to present a true cylindrical surface, is cut open by cutting out a piece for forming an open space in the ring; This ring is externally surrounded by aring b,made up of a number of parts or segments, and this ring I) in turn is surrounded by a ring 0. To enable the ring a to be contracted to a smaller diameter with comparative case, it is preferably provided with a greater or less number of notches a a? a a &c., extending inward from the outer periphery of the ring, each notch or terminating in a drilled hole to obviate any splitting of the ring beyond the endof the notch. Now when itis desired to adjust the ring a to a predetermined diameter a supplemental piece or wedge, such as a, of sufficient width (or length) is inserted into the open space of the ring a. It will be readily 1 understood that by selecting a piece of the proper size for insertion the inner diameter or periphery amay within certain limits be varied at will. After the insertion of a piece a of the required size, which, if need be, may havea shape different from that shown in the drawings, the ring a is compressed by the application of considerable force from outside until the inserted piece a is tightly clamped in the open part of the ring ca; Preparatory to the compression of the ring a by machinery this ring is externally surrounded by the ring b, made up of any number of parts, and this ring bin its turn is inclosed in the ring 0. The outer surface of thering b and the inner surface of the ring a are so inclined in opposite directions that by forcing the ringc down the ring I), and thereby the inner ring Ct, is contracted and the ends of the ring (I. pressed against the piece a,'inserte'd in the ring a, the ring a being thereby adjusted to the diameter determined by the size of the inserted piece a. (See Fig. 1.) By moving the ring 0 upward the ring I) is released, and the ring a expands by reason of its elasticity. All these rings a, b, and c, (which may, if necessary, be supplemented byintermediate pieces d,) as shown in Fig. 1, are supported by a rotatable face-plate f, which is set in motion'by a toothed wheel 6. Within the face-plate f, below the ring 0, is the operating mechanism, whereby the ring 0 may with great force be drawn downward or driven upward, as the case may bei. 6., according as the face-plate f is by means of reversinggearing or the like set in rotary motion in one direction or the other. This mechanism for moving the ring 0 upward or downward consists of a number of screws 9, nuts h on said screws and journaled and held against endwise movement in the face plate f, and toothed wheelst', secured to the nuts h. The toothed wheels 2" are all arranged to engage with the toothed wheel 70, located in the interior of the face-plate. This toothed wheel is, moreover, provided with a number of teeth on its downward surface, whereby the possibility is afforded of arresting the said wheel by the aid of a'tappet or pawl m, pivoted to the standard Z. So long as the said arresting tappet or pawl continues in the position shown by the full lines in the drawings-z'. e., while itis out of engagement with the downward teeth of the Wheel k-no relative displacement of the latter and the toothed wheels 2' can take place as a result of the rotation of the face-plate f, and consequently the screws or worms g receive no axial motion; but the moment the pawl m becomes caught in the wheel is, for which purpose it must take somethinglike the position indicated in dotted lines, the Wheel 10 will be held against rotation with the face-plate f, and the wheels '0', moving with the face-plate, will be caused to rotate by reason of their ongagement with the then stationary wheel is, and thereby to move the ring 0, the interior of which is made of conical shape, either downward or upward, according to the direction of rotation of the face-plate. By such means the ring a is either tightly compressed or allowed to expand back to a larger diameter by its resiliency.

In the stationary pedestal or standard Z is mounted the vertical roll 91., while the faceplate f is supported by a slide-rest 0, adapted to be moved backward and forward in the direction indicated by the arrow.

Now when a tube end, 850., is to be rolled to a predetermined peripheral size a supplemental piece a of the required length is first of all inserted into the ring a, so that when this ring has been compressed its inner diameter shall correspond to the peripheral dimensions of the tube end. The tube or the likep is now placed in the position shown in the drawings and is held there in such a manner thatit can move neither upward nor downward, but that it may revolve freely without altering its vertical position. Now the rest 0 is moved in the direction of the arrow with great force by means of any suitable mechanism. As soon as the tube or pipep is tightly compressed between the roll 12 and ring a the face-platefis set in rotary motion, and the rolling of the end of the pipe or tube is continued until such end completely fills the ring a. The ring a is cut open to facilitate the release and removal of the tubes tightly compressed inthe ring in the process of rolling and also for the further purpose of enabling a comparatively small number of rings a to answer all practical requirements in the course of manufacture. It will be understood that the ring might be cut open at more than one point and a corresponding number of supplemental pieces a provided. The construction shown is, however, preferred.

The rolling of the tube ends must be performed cold ifit be desired accurately to calibrate the tubes, as otherwise the non-uniform shrinking consequent upon heating might prove a source of defects. I

The principle of the invention would still apply were the roll at driven by machinery instead of the face-platef, or, again, if both these parts were so driven and the means for displacing the slide-rest o in the direction of the arrow might be replaced by or combined with an arrangement for the lateral displacement of the standard Z or of the roll n.

What I claim as my invention is- 1. In a machine for rolling tube ends, the combination with an inner rolling member, of a partly-open ring forming the outer rolling member, a supplementary piece adapted to be inserted into the open space of said ring, means for contracting and enlarging said ring, and means for actuating one of said rolling members to cooperate with the other to roll the tube end between said members, substantially as described.

2. In a machine for rolling tube ends, the combination with an inner roller, of a partlyopen ring forming the outer rolling member, a supplemental piece adapted to be inserted into the open space of said ring, means for contracting and enlarging said ring, and

means for rotating one of said rolling members, substantially as described.

3. In a machine for rolling tube ends, the combination with an inner roller, of a partlyopen ring forming the outer rolling member, a supplemental piece adapted to be inserted into the open space of said ring, means for contracting and enlarging said ring, and means for rotating said ring, substantially as described.

4. In a machine for rolling tube ends, the combination with an inner roller, of a partlyopen ring, forming the outer rolling member, said ring being provided on the outer periphery with a number of notches, a supplemental piece adapted to be inserted into the open space of said ring, means for contracting and enlarging the said ring, and means for rotating one of said rolling members, substantially as described.

5. In a machine for rolling tube ends, the combination with an inner roller, of a partlyopen ring forming the outer rolling member, a supplemental piece adapted to be inserted into the open space of said ring, a number of ring segments surrounding said ring and which are inclined at their outer faces, a ring surrounding the ring-segments and oppositely inclined on the inner face, means for moving theouter ring upward and downward, and means for rotating said rings, substantially as described.

6. In a machine for rolling tube ends, the combination with an inner roller, of a partlyopen ring forming the outer rolling member, a supplemental piece adapted to be inserted into the open space of said ring, a rotatable face plate, ring-segments having'inclined outer faces, an outer ring having an oppositely-inclined inner face, screws arranged in said outer ring, pinions on said screws, a toothed wheel rotatably mounted on the faceplate in engagement with said pinions, and means for holding the toothed wheel against rotation, substantially as described.

7. In a machine for rolling tube ends, the combination with an inner roller, of a partlyopen ring forming the outer rolling member, a supplemental piece adapted to be inserted into the open space of said ring, a rotatable face-plate movable transversely of the axes of the rolling members, ring-segments having inclined outer faces, an outer ring having an inclined inner face, screws arrangedin said outer ring, pinions on said screws, a toothed wheel rotatably mounted on the face-plate in engagement with said pinions, and an arresting tappet or pawl adapted to be brought into engagement with teeth on the under surface of said toothed wheel, substantially as described.

8. In a machine for rolling tube ends, the combination with an inner roller, of a partlyopen ring forming the outer rolling member, a supplemental piece adapted to be inserted into the open space of said ring, a rotatable face'plate for supporting said ring and movable transversely of the axes of said rolling members,means for contracting and enlarging said ring, and means for rotating one of said rolling members, substantially as described.

9. In a machine for rolling tube ends, the combination with an inner rolling member, of a partly-open ring forming the outer rolling member, said ring having a single opening, a supplemental piece adapted to be inserted into the open space of said ring, means for contracting and enlarging said ring, and means for actuating one of said rolling members to cooperate with the other to roll the tube end between said members, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- DBSSGS.

' HERMANN RINN E.

Witnesses:

PETER LIEBER, WILLIAM ESSENWEIN. 

